
<!DOCTYPE html>
<title>Test shared workers aren't shared across fenced frame boundaries.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>
<script src="resources/utils.js"></script>
<body>
<script>
promise_test(async(t) => {
  const fencedframe = await attachFencedFrameContext();
  const worker = new SharedWorker(
      "/fenced-frame/resources/shared-worker.js");

  const messagePromise = new Promise((resolve, reject) => {
    worker.port.onmessage = evt => {
      // The main frame should not get a postMessage from the fenced frame's
      // SharedWorker, even though the main frame and fenced frame are
      // same-origin to each other.
      reject();
    };
  });
  await fencedframe.execute(async () => {
    // The worker will take anything postMessaged to it and postMessage it to
    // all registered ports.
    const worker = new SharedWorker(
        "/fenced-frame/resources/shared-worker.js");
    worker.port.postMessage("message");
    await new Promise((resolve) => {
      // Sanity check that the postMessage() is making to the fenced frame.
      worker.port.onmessage = evt => {
        resolve();
      };
    });
  });
  const timeout = new Promise(r => t.step_timeout(r, 1000));
  await Promise.race([messagePromise, timeout]);

}, 'Shared workers should not be shared across fenced frame boundaries');
</script>
</body>
